Race details

Silverton Ultra Dirty Race details

Aid Station Locations

Aid #1 — mile 11.4 – Molas Pass
Aid #2 — mile 21.93 – Rolling Pass
Aid #3 — mile 28.78 – Cascade
Aid #4 — mile 37.06 – Engineer
Aid #5 — mile 50.17 – Bandera
Aid #6 — mile 56.52 – Putnam

Aid Station Fuel & Food
Our goal is a 100% finish rate for the Silverton Ultra Dirty 60K/100K, so we supply the following fuel and provisions at each aid station. For tips on how to fuel your ultra, visit our Ultra Training Program page.

* You may like to train for the Silverton Ultra Dirty with Tailwind, VFuel gels, and other foods listed below to see what works best for you on course and determine what you will use at our aid stations and what you may want to carry.
** Please feel free to suggests any foods you find helpful that you do not see listed below and we will look into it. Thank you!

Each runner must carry at least 40 oz of water carrying capacity.
Aid stations will be generously stocked food appropriate for the time of day you will be there.

Tailwind Electrolyte Drink – (non-caffeinated)
Cascade water
Fruit – oranges, bananas, watermelon
Potato chips, cookies, pretzels
Turkey wraps
Chicken noodle soup
Miso soup

We Are Cupless

It goes without saying for the distance and remote nature of this course, but as a Green move, both the 60K and 100K are cupless races, so there will not be any cups at aid stations. Runners are required to carry their own hydration system!

Aid Station Supplies

Each aid station will also be supplied with the following items:

Basic First Aid

Course Support
Aid Stations are staffed with experienced, knowledgeable, supportive, friendly volunteers who all go way out of their way to assure you have a fun and successful race.
Aid stations will have ham radio operators on site for communication with medical and emergency staff
Emergency medical support is on call from each aid station. Basic First Aid is available at each aid station.
Please thank the volunteers. The Silverton Ultra Dirty would not be possible without their help!

Aid Station Details and Locations

Aid Stations are so much more important to runners in a challenging ultra trail run because they are not just a place to grab a bite and refill your water and hydration. They are a place to regroup, take stock of how you feel, and get fantastic support from a group of warm, friendly, knowledgeable volunteers who are there to make sure you are doing OK and to keep you moving. Here’s what to expect at each aid station along the Silverton Ultra Dirty 60K/100K.

Drop Bag Requirments:
See the list on the Drop Bags page for required gear you must carry or drop at each aid station, like a headlamp for Aid #4.

Note: Crews can not drive to the following aid stations:

Aid #2 … Hike in access only

Aid #3 … There is no access for crews at this aid station
Aid #5 … Crews may hike only to this aid station
Aid #6 … Hike in access only


Aid #1 – Molas Pass – Mile 11.4

Located at the top of Molas Pass just south of Silverton in the paved parking lot. There will be a lot of fun energy here. The first runner will arrive around 7:30 a.m. It only takes 15 minutes to drive here, so you have some time to grab a coffee or tea after the start of the race. Note to Runner’s: Don’t get too distracted by this party at 11,000 ft. Fill up with lots of water and electrolyte. It is 10.3 exposed miles to the next aid station and you will be limited to the amount of water you get at Aid 2 because this is a remote aid station and all the water must be pumped.

Aid #2 – Rolling Pass – Mile 21.93

This aid station is at 12,000 ft elevation and is 3.4 miles from a trailhead. All supplies are backpacked in by amazing volunteers. Runners will be limited to just 40 oz of liquid at this station for the 100K racers and 30 oz for the 60K’ers. It is 6.75 miles to the next aid for 100K runners and 3.4 miles to the next aid station for the 60K runners, so get what you need here, but know you will hit the next aid station in just under 7 miles ahead or 3.4 miles for the 60Kers. 

Aid #3 – Cascade Creek Rd – Mile 28.8

This is a 1.5-hour drive in on a rough 4-wheel drive road. Your crew is not allowed here. This aid station is a short .07 mile jaunt to the left off the Colorado Trail. 

Aid #4 – Engineer Mountain TH – Mile 37.3

This aid station is located about 25 min. south of Silverton on the south side of Coal Bank Pass. Drive approximately 6 miles down the south side of Coal Bank Pass from the summit. The turn to Aid 4 will be on your right just south of the run-way truck ramp. The turn will be marked with Dirty 30 signs. Crew and spectators are allowed here. Runners will be spread out enough that there will be room for people to come and go. It is a tough 13.1 miles (10-mile climb) to the next aid station, so be sure to plan accordingly. Make sure to put your headlamp in the drop bag for this aid station.

Aid #5 – Bandera Mine – Mile 50.17

This aid station is at the southern end of South Mineral Creek Rd. at the old Bandera Mine site. This is where you will cross the creek coming off of the Rico-Silverton Trail onto S. Mineral Creek Rd. This is 4-wheel drive access, and crews are not allowed to drive here. If your crew drives here you will be disqualified. Crew members or pacers can hike to this aid station from the Ice Lakes Trailhead parking area. It is about a 2.5- mile hike up the 4-wheel drive rd.

Aid #6 – Putnam – Mile 56.52

This is a backcountry/hike in aid station. This is the same aid station as the Hardrock 100 Putnam Aid Station. Crew is not allowed here.

Pacers may join you at:


  • Aid 4-Engineer Mtn TH. – Mile 37
    • 20 – 25 min drive south on Hwy 550 from Silverton.
  • Aid 5 – Bandera Mine – Mile 51
    • 2.5-mile hike up S. Mineral Creek Rd (4-wheel drive rd) from Ice Lakes Trailhead.  No spectators, crew or pacers may drive past Ice Lakes TH.  If your crew or pacer drives to Aid 5 you will be disqualified.  This is a narrow 4-wheel drive rd and we are not permitted to jam it up with traffic.


Aid 5 – Bandera Mine – Mile 25.8 (Aid 3 for the 60K)

    • 2.5-mile hike up S. Mineral Creek Rd (4-wheel drive rd) from Ice Lakes Trailhead.  No spectators, crew or pacers may drive past Ice Lakes TH.  If your crew or pacer drives to Aid 5, you will be disqualified.  This is a narrow 4-wheel drive rd and we are not permitted to jam it up with traffic.

Course Marking

Course is divided into 4 sections.  Course markers will head out on Friday to mark their section.

Section 1 – Start to aid 1 (11.3 miles).
Section 2 – Aid 1 to Aid 4 ( 25.6 miles).
Section 3 – Aid 4 to Aid 5 (13 miles)

Section 4 – Aid 5 to Finish (12 miles)


Friday – August 2, 2019

Event Time Location Notes
Packet Pickup – 4-7 p.m. Grand Imperial Hotel Please do your best to arrive before 7:00 p.m. If you cannot, we will accommodate you.
Pre-Race Meal,  5:30 – 7:00 p.m. Grand Imperial Hotel  Please pre-purchase your dinners on ultra-sign up so the restaurant knows how many people they are feeding.
MANDATORY – Pre-race briefing 7:00 – 8:00 p.m. Grand Imperial Hotel This is a mandatory meeting.


Saturday – August 3, 2019

Event Time Location Notes
Breakfast 4:30 AM Coffee Bear – 13th and Greene St. You may pre-order your breakfast burrito at packet pick up and they will have it ready for you on Saturday morning.
Race Morning Check-In  5:00 -5:30 AM Grand Imperial Hotel
Race Start – 100K and 55K  6:00 AM Harmony Park 12th & Greene St.
55K Finishers   12:00 pm – 9:30 pm Harmony Park – 12th and Greene St.
100K Finishers 7:00 pm – 7:00 am Harmony Park 12th and Greene St.


Sunday – August 3, 2019

Event Time Location Notes
Finish line closes 7:00 a.m. Harmony Park
Breakfast  7 – 9:00 a.m. Grand Imperial Hotel  Volunteers will be treated to breakfast. Please come join us to celebrate, share stories and connect.  Racers, family, and friends may purchase their own breakfast.
Group Photo 9:00 a.m. 12th and Greene St. Wear your race and volunteer shirts.  We will take a all racer and volunteer group photo in front of the Grand Imperial Hotel on Greene Street.
Awards  9:15- 10:00 a.m. Grand Imperial Hotel Professional photographer and ultra runner, Howie Stern will present a slide show from the weekend’s events at 9:00 a.m.  Awards will follow.

100K & 60K Racers –

All racers are required by the San Juan County Sheriff to carry a GPS tracker.  Silverton Ultra Marathon will employ MAProgress to provide GPS tracking for this race.  Their integrated system will allow us, as well as the rest of the world,  to see each runners GPS tracker on the course.  You may share this link with your friends and family so they can follow your race.

If you have a SPOT or an InReach GPS Tracker you may use your own or you may rent a tracker from MAProgress.  The advantage of renting a tracker from MAProgress is they are the SPOT Trace tracker which is much smaller.  They have a pouch that will attach to your hydration pack.  You will not need to worry about anything.  If you have your own tracker you will need to log on to MAProgress’s site and register your tracker so we will be able to see your tracker on the course map.

Rent your tracker or register your tracker at:

Rent your tracker or Register your tracker here

2019 Silverton Ultra Dirty Live Tracking

This MANDATORY GEAR LIST is for both the 100K and the 60K races. You will be many miles and hours away from aid stations and other outside help while on this course. These courses are mostly above 11,000 ft where the weather is more severe and harsh, leaving you with little protection. Your well-being and safety are our responsibility and thus you must come prepared with the following items and be carrying them at all times during this race. The weather can change from beautiful blue skies and warm to a freezing, life-threatening hail storm with no warning.

Please carry each of the following items with you from the start of your raceYou may supplement with items in your drops bags to have extras of each item in case you get wet, cold, etc. Having a change of dry, warm gear and layers waiting for you at each aid station is key to your comfort, safety, and success! Dry layers do not need to be fancy—beg and borrow these additional layers from friends or purchase at thrift shops. Again, staying dry is the key to your success.

See more details about drop bags Here.

Mandatory Gear:
1. Rain Jacket with hood—Gortex or equivalent. A lightweight rain jacket is not adequate.
2. Mylar space blanket
3. Gloves with some waterproofing or water resistance
4. Hat and/or buff

Highly Recommended Gear:

1. Rain pants
2. Lightweight Marino wool base layer in a baggie to put on after you get caught in a rainstorm, to get the wet clothes off of you.

1. Use the table below to plan for where you want your drop bags waiting for you along the race course and at the finish line.
2. Make sure you put your drop bags at the correct locations and at the correct times, according to the table below.
3. Put a reminder about these dates and times in your calendar as we do not send reminders and do not accept drop bags except at these times below.

Drop-Off Instructions
Day: Friday of Race Week
Time: By 5:00 p.m. / no exceptions.
Aid 3 and Aid 5 crews head to their aid stations Friday afternoon.
Location: The American Legion building on the SW corner of 11th and Greene Street, Silverton, CO.

Drop-Bag Checklist:
Size limit
Your bag should not be much larger than 18 x 18 inches. Let’s keep it reasonable. Volunteers are hauling a couple hundred drop bags.

Clearly mark your bags
Please attach the following information to each bag. Use waterproof tape and/or marker so your information will not fall off your bag:
1. Name
2. Bib number
3. Aid Station location

Waterproof bags
Use a waterproof bag and marking system. We will do our best to keep your bags out of the weather, but we cannot guarantee they will not get wet.

Secure the contents of your bags
Make sure you use a bag where everything is tightly contained in your drop bag. We will not be responsible for items that have fallen out of your drop bag.

Special Note – Finish-line bag
Change of warm, dry clothes. I have seen racers finish cold and wet. It is particularly important to have warm, dry clothes to change into if you are staying somewhere other than a close, local Silverton hotel. Be prepared and plan for the worst-case weather scenario.

Gear Checklist:
1. Headlamp
2. Extra socks/shoes. Hiking poles
3. Specific nutrition needs for aid stations and the finish line

Lost & Found … or Donated
1. If you leave your drop bag at the race, Megan will be heading back to the Boulder area a few days after the race and can take any bags to a local running store so you can pick them up there.
2. If you do not pick up your bag within 2 weeks your bag and its contents will be donated to Goodwill.

Thanks to all of our incredible sponsors